4, roadbed, road drainage works: lots of high-filled excavation and embankment strengthening works protective works: This section is very important, for subgrade drainage, using ditches, drainage ditches, drainage facilities, such as jet slot; for road drainage, a road humps on the road for the desi

4, roadbed, road drainage works: High-reclamation dug lots of roadbed reinforcement works as well as protective works: This is quite important, part of a roadbed for drainage, using the side ditch, gutters, Chase rapids tanks, and other drainage facilities; the road to the road surface drainage, out

4th, roadbed, surface drainage project: Gao Tianwa land sector protection project as well as roadbed reinforcement project: This part quite important, regarding the subgrade drainage, has used draining water facilities and so on the side ditch, catch drain, anxious launder; Regarding the surface dra

4, and subgrade, and pavement drainage engineering: high filled dug lots of protection engineering and subgrade reinforcement engineering: this part quite important, for subgrade drainage, used has gutter, and cut ditch, and Rapids slot, drainage facilities; for pavement drainage, out has on pavemen

4, and subgrade, and pavement drainage engineering: high filled dug lots of protection engineering and subgrade reinforcement engineering: this part quite important, for subgrade drainage, used has gutter, and cut ditch, and Rapids slot, drainage facilities; for pavement drainage, out has on pavemen